Hot blast for boiler-furnaces.



P. H. BAGLEY.

HOT BLAST Pon BOILEB FUBNAGEB.

.YPLXOATIOI FILED Dl20 18. 1907. y

Patented Apr. w, 11910.

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PERKINS H. BAGLEY. 0F SAN FRANCISCO. CALIFORNIA.

HOT BLAST FORBOILER-I`URNACES.

Specification el Letters Patent.

Patented Apr. It), 1010.

Application ated December 18. 1907. Serial No. 408.804.

To all 'ulwm it muy ronccrn:

Bc it known that I, lizaalxs ll. Banani', a citizen of the United States. resdin at San Francisco, in the county of San Irancisco a'id Stute of California, have invented a new and useful Ilot Blast for Boiler-Furnaces, of which the following is a slweitication, in such full and clear ternis as will enable those skilled in the art to construct and use i'he saine.

This invention relates to a nn-ans for the purpose of heating n blast of air for the more complete combustion of fuel in lire boxes of boilers xind other furnaces where a thick bed of coal is burnin". It is well known that where there is a Tar e amount of coal on tire that the air is wit i dilliculty burned to carbon dioxid, much of it bein f reduced in its passage through the thick of hot fuel to carbon monoxid with a corresponding loss of heat. units, since the heat given ntl by the burnin of oxygen to caron lnonoxid is only a out one third the heat given ott' by the burning of ox 'gen to carbon dioxid. [his loss is very di cult. to avoid for the reason that a large maas of coal must be heated in order that it ma be in condition to give out the necessary cat when its time cornes to burn to ashes, and this thick bed of fuel is always reducin the burning air and coal to carbon monoxit on its way up through the coal which is heated to such a temperature that the redliction takes place.

The object of this invention is to furnish the air necessary to burn the carbon luonoxid, al'tcr it has formed, to carlmndioxid, and to heat the air thus furnished to such a temperature that it will easily c-nnbine with the nionoxid and make certain the liberation of the greatest quantity of heat from the given uniss of fuel.

This invention is an iluprmeinent ou the invention disclosed in patent granted this applicant maler Number 566,837, and dated sept. 1, woe.

Another object of the invention is to ntuko a device that can be applied to any lire box no s cial means being nccessar to prepare the ire bx for the reception ofythis device.

ln the drawings in which the same numerals of n-.fcrcnce are applicd to the salue. parts throughout, Figure 1 is a front cnd view of a marine boiler with the ends of the lire boxes ontto show this device in place, "ig. 2 is a plan view of the lire box in horizontal section. Fig. 2l is a vertical longitudinal sectional view of about one half of one of thc hot blast members, and Fig. 4 is a view in vertical .section of one of :.aid titellibers and a part of the lire box looking from one cud. the three latter ligures being on a larger scale than the lrst ligure.

'l'hc numeral l represents the boiler and thc tube.` in the saule, although it is to be understood that the device may be applied equally well to anv boiler cven if not of this type. ln the lower part of the boiler are placed the lireboxes Il, il having the grate barsV t3 supported at the front of the lire box b v nit-ans of a cross' bar 6. This hot bla-t is shown at 4 and 5 and consists of a large heavy casting of very thick metal and for large boilers weighing about 400 to H00 pounds t'or each section of which there are three. two side sections nml one rear section. the latter extending across the grato bars and holding each of thc I'ornicr in their bluccs at the sides ot the lire box. lho members l and 5 are all precisely alike save for the fact that 5 has its to i eut down on n circle as shown iu Fig. 1. l'Iat-h member is hollow alnl has a vertical partition S) dividing it longitudinally into two parts` a second partition l0 dividing it vertically into two mrts, four compartnwuts being thus formed. ilachdiot blast tnelnber is about ten inches high und the lnetnl in it is about two inches thick, a slot 't' running l'roin end to end of each lneutber on the bottoni thereof, alul a series of .slots S are formed in the top of the saule.. .\'ow it will be noted that the air as it conn-s into the ltot blast. front l'elow the lire will come against the hot walls of the members 4 and 5 and will pass along tho partition It) until it. can escena'. around the end oli the salue and pass to the upper part of said tnemliers when it will be heated very hot and as it blasts out of the slots 8 it will cause all the carbon lnonoxid that has formed in the bed of coal to be at oll burned to carbon dioxid with the liberation ot a ver)I nue-h larger quantity of heat bel'orc its inseam from the lire box. Une result of this device is that the smoke escaping from tbll boiler is almost. colorless, practically all ol' the carbon being burned to a gas. 'lhis umkes the device of very great uw in cities where the laws do not. ullow the I below to the to? ofthe body of coul on the wcnpo of henry black clouds of smoke from chilnnvys.

Haring thus described my invention whut chlinl us now :nul dvsirtto sururu b v Lettvrs lutont ofthe linilvd States is us follows, nuulilirntons within lln- .wc-ope of tht* -|ni|ns bvin,1.`r rt-wrrtd.

l. 'lho combination with n lnu'u huving u lirvbox of hollow roundingr thu tirvbox :it two vnd. .mid hollow bodivs comprising :l shtll inning two longitudinal slots in thv undor sidithvrvof und :t plurality of horizontal i l i u-rtirul wvl ronnvt-tinf.r thv nppor und louvr pnl-t of vmid body :und tln- .-id.-: tlwrvol' nvur thv a'vntvl' of Ihr lvngth of snill body. nml Iwo horizontztl u'vbs runnin-ting thel nidos of tht- |nnl und rxtvuding from thvv wub ut thv vt-ntc-r lowurd tht` vnds of Suid body ln-rob) :t rfor nir is nrovidod from grim: bars of t (inscribed. f

The combinution of :l furnace havin grate bars. u hollow body adapted to be plm-cd on thtx grutv bnrs, said body lnn'in two lon itudinnl doth4 in its under sido un :t Inra itv of horizontal slot-` in its upper sitlc :l we vonnucting thtl top, bottom und .widtw of snid bod)i luur tht! m-nlvl tltcl'of, :und :n pnr of wvbs mnnm'ting tht.l first. web :und thv two sdvs ot' said body und forming ne lire box, substantially us with .Huid body u rhnnlwl whvrvin :tir sup- 

